These files are part of the dataset
"Historical Land Use for the U.S. 1940-2015: Major Class",
contained in the dataverse  HISDAC-US: Historical Settlement Data Compilation for the United States  
(https://dataverse.harvard.edu/dataverse/hisdacus).

Reference:
Mc Shane, Caitlin M.; Uhl, Johannes H.; Leyk, Stefan 2021, "Historical Land Use for the U.S. 1940-2015",
https://doi.org/10.7910/DVN/LNBJIO, Harvard Dataverse.

The gridded surfaces (*.tif) contained in the Majority.tar.gz archive represent the majority land use contained within grid cells of 250x250m, for each year from 1940-2015.
Moreover, there is a file called LU_ThemeMaj_2016.tif contains all properties with a land use description from the underlying ZTRAX dataset,
regardless the value or availability of the built year attribute. Thus, LU_ThemeMaj_2016.tif represents the spatial distribution of land use for all
property locations approximately in 2016, when the underlying ZTRAX data were compiled.

Historical Land Use for the U.S. 1940-2015
Abbreviations and explanations:
Geo-Referenced:		Records are georeferenced if an explicit latitude and longitude is provided in ZTRAX.
Missing Grid-ID:	Records without an explicit latitude and longitude, which could not be grid-indexed.
Grid Cell Value:	The most frequent land use per grid cell using one of six land use themes
				Theme '1': Agriculture
				Theme '2': Commercial
				Theme '3': Industrial
				Theme '4': Recreational
				Theme '5': Residential-Income
				Theme '6': Residential-Owned

Data source: Zillow Transaction and Assessment Dataset (ZTRAX) (c) Zillow Inc.
Spatial resolution: 250m
Coordinate reference system:
USA Contiguous Albers Equal Area Conic USGS version (SR-ORG:7480)
https://spatialreference.org/ref/sr-org/usa_contiguous_albers_equal_area_conic_usgs_version-2/
Proj4: +proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23.0 +lon_0=-96 +x_0=0 +y_0=0 +ellps=GRS80 +datum=NAD83 +units=m +no_defs

Contact:
Stefan Leyk
Department of Geography
University of Colorado Boulder
GUGG 110, 260 UCB 
Boulder, CO 80309-0260, United States of America
stefan.leyk@colorado.edu